Transom-ratchet.



Patented Nov.2, 1909.

. UNITED sTATEs PATENT oEEIoE.

LABS J. BERG, vor CHICAGO, ILLINOIS, AssICNoR'TO METALLIC sHEATHINeCOMPANY,-

f or' CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS, l l'rnANsoM-RATCIIET.

938,952. Specicativn 0f Lemrs Patent. Batented N ov. 2, 1909. J

ject to construct a device for maintaining' the ventilator in anydesired position of adjustment, and for holding said ventilator 1n asecure and firm position when so adjusted; and to construct a deviceAwhich is simple in operation, durable in construction, and cheap ofmanufacture.

Otherobjects willappear from a detailed description of the invention,which consists in the features of construction and combination ofclaimed.

In the drawings, Figure lis an outside view of the car Ventilatingvwindows of the parts hereinafter described and type ordinarily usedinthe construction of passenger cars; 2 a side view of the ratchetmechanism in its closed position;

Fig. 3 a view similar to Fig. 2, showing the .parts in position when thetransom is in a partlylow red position; Fig. 4 a somewhat enlarged sideview of the ratchet mechanism, partly in section; Fig. 5 a detail of theroller; and Fig. 6 a plan view of the arm for carrying the roller.

As shown in Fig. 1, the Ordinary car ventilating windows 7 are placedbetween fixed standards or supports 8 in thev construction ordinarilyused 1n cars, and the ventilator 7 comprises a framework 9,' at oneend'of which is attached a -pivotl() consisting of a plate 1,1 aliixedto the frame9 of the ventilating window, projecting from which is an ear12 which engagesl a lug 13 attached to a plate 14, secured to theframework 8 lof the car body, and a pin projects from the ear 10 intothe lug '13, forming a pivot for that end of the Ventilating windowaround which it swings. On the opposite end of the Application meaJanuary a5, 1909. srial No. 474,053.

venti-lating frame 9 is attached the ratchet mechanism formaintainingthe window in any desired position of adjustment. This mechanismcomprises a fixed portion -15 which consists of a plate 16 attached tothe framework 8 of the car body; andformed integrally with the plate 16,is a housing 17 which has its front and rear walls, attheir lowerend,cut away, and its side walls extending downwardly in a taperedformation, forming legs 18, the ends of which -are bent to form hooks19..

The 'movable section 20 of the ratchet mechanism consists of a plate 21which is secured to theframework 9 of the ventilator window. Formedintegrally with said plate -is-a segmental portion 22 the base of whichhas formed thereon a hub 23 which has projecting therefrom trunnions 24,about which the hooked ends 19 of the legs 18 of thejlixed portion 15are positioned. The curved portion of the segmental rack 22 has formedon' its face a'toothed, surface 25, which consists of `a series oflround teeth 26 upon which a roller is adapted to travel. The roller 27is carried between ears 28 formed integrally with a head 29 projecting*from the inner end of an arm 30. The arm` 30 is pivotally secured at itsouter end 31 to the plate 16. And, passing through the head 29, is a rod32, which is upset at its lower end 33, 4the upset portion beingslightly countersunk into the head 29,v and the rod 32 is screw threadedat its upper end to receive a nut 34. Interposed between the head 29 andthe top of the housing 17, and surrounding the rod 32, 1s a coil spring35,

which holds the roller 27 under a spring tension against the surface ofthe toothed edge 25 ofthe segmental rack 22. It will thus be seen thatas 'theroller 27 travels over the toothed surface 25' of the segmentalrack,

when it strikes the depressions 1n the toothed surface of the rack, theroller being under the forcible spring tension that it is, will be heldin a firm enough position to withstand the jars or vibrations ordinarilyreceived in I the upper'vent'ilatmg windows of a railroad car.

By manipulation of the nut 34 the rod 32 can be drawn-upwardly, lcausingthe roller 27 to be drawn upwardly therew1th,thus allowing the roller tocontact only the upper portion 'of the'toothed surface of the segmentalrack and making the window easy of manipulation.

It will be seen that when it is desired to open the windows for thepurpose of ventilatingA the car, it will be possible, with this device,to open them all to the desired degree. When the windows'are fullyopened, Vthey will turn down to a positiony at right angles to thevwindow casing, and the window's may be adjusted to intermediate posiofthe window and create friction, whic would tend to wear out and-loosenup the parts. What I'claim as 'new and desire to secure byLetters Patent is: a

1. In a transom ratchet, the combination of a fixed'section and amovable section, the movable section adapted to travel with the transomand having a pivotal bearing in the fixed section, and means attached tothe fixed section and kept in constant engagement with the movablesection for retaining it in various positions, substantially asdescribed.

2. In a transom ratchet, the combination of a fixed section and amovable section, the movable section adapted to travel with the `transomand having a pivotal bearing in the fixed section, anda toothed surfaceon the movable section adapted to be constantly engaged by locking meansattached to the fixed section said locking means lying in tangentialrelation to the -toothed surface and adapted to holdvthe movable sectionin anyl desired position, substantially as deiscribed.

3. In a transom ratchet, the combination of-a fixed section and amovable section, 'the movable section adapted to travel with the transomand having a pivotal bearing in the lfixed section, a toothed surface onthe movable section adapted to be constantly engaged by locking meansattached to the fixed vsection said locking means lying in tangentialrelation to the toothed surface and adapted to hold the movable sectionin any desired position, and trunnions on the movable section adapted tobe engaged by the side walls of a housing attached to the fixed`section, substantially as described.

4. In a transom ratchet, the combination of a fixed section and amovable section, the

movable section comprising a plate attached ess-,esa

to the frame of the transom, a segmental rack formed with said plate,trunnions protruding from the base of the segmental rack portion, thefixed portion comprising a plate and a housing attached -to the plate,the side walls of which are adapted to enga e the trunnions on the baseof the segmenta rack portion, a roller incasedv by said housing and4adapted to be held ,under spring tension against the faceofthe'segmental rack portion of the movable section for holding the.v

movable section in any desired position, substantially as described.

'5. In a transom ratchet, the combination of'a fixed section and. amovable section, the

movable sectionl comprising a plate attached.

to the frame of the transom, a segmental rack formed with said'plate,trunnions protruding from the base of the segmental rack portion, thefixed portion comprising a plate and a housing havingits front and rearwalls cut away Iat their lower portions, side walls extending downwardin a tapered 'formation, and bent to form hooks at their,y

lower ends to engage the trunnions of the segmental rack ortion, aroller incased in said housing an adapted to be held under springtension against ythe face of the seg# mental rack ortion' of, themovable section for holding t evmovable section in anyvdesired positron,substantially as described.

6. In a transom ratchet, the combinationmation, and bent to. form hooksat their lower ends to engage the trunnions of the segmental rackportion, a roller carried by ears formed with a head protruding .from

the end of a' pivotally'attached arm, said' roller adapted to be heldunder sprin tension against the face of the ,segmenta rack portion ofthe movablesectionl for holdingv the movable section in any desiredposition, substantially as described.

7. In a transom ratchet, the combination of a fixed section and amovable section, the movable section comprising a plate attached to theframe of thetransom, a segmental rack formed with said plate,trunnionspro'- iis truding from the base of the segmental-rack portion,the fixed portioncomprising a plate and a housing havin its front andrear walls cut away at their lower portions,.side walls extendingdownward in a tapered :for-A mationand bent .to form hooks'at theirlower ends to engage the trunnions of the segmental rack portion, aroller carried by ears formed on a head protruding from the circling therod for holding the roller in enend o f a pivotall attached arm, a rodpassrack portion of the movable section for in through the ead and upsetat its lower holding the movable section in any desired en ,the upperend ofthe rod screw threaded position, substantially as described.- toreceive a nut, aspring interposed between LABS J. BERG. the head and thetop of the housing and en- Witnesses:

WALKER BANNING,

gagement with the face of the segmental l FRANCES M. FROST.

